68 results about "Chlorate" patented technology

The disclosure relates to a method of producing a multi-metal catalyst film and of producing a reactor system for catalytic removal of a wide variety of contaminants (for example, nitrate, nitrite, perchlorate, chlorate, chromate, selenate, chlorophenols, 2,4-D, dicamba, atrazine, trichloroacetic acid, bromochloroiodomethane, NDMA, TCE, TCA, chloroform, freons, RDX, HMX, TNT, PFOA, and PFOS) from water and wastewater. The disclosure also relates to a method of using the multi-metal catalyst for the removal of such contaminants and a system comprising the multi-metal catalyst film for removing such contaminants.

The invention belongs to the technical field of civil engineering materials, and particularly relates to sprayed concrete suitable for a chlorine salt erosion environment and a preparation method of the sprayed concrete. And meanwhile, the bionic helical carbon nanotube-polymer composite gel is pre-dispersed in water. Sequentially adding the aggregate, the fiber and the composite cementing material, carrying out dry mixing, adding the gel dispersion liquid, the water reducing agent and the air entraining agent, and stirring to obtain a mixture; and finally, adding an alkali-free liquid accelerator at a nozzle through a wet spraying process, and spraying the alkali-free liquid accelerator to a construction surface. The nano hybrid material can effectively adsorb and lock chloride ions, and the bionic gel has a crack self-repairing function. And the two components have a synergistic effect, and are combined with a compact microstructure and a fiber reinforcing and toughening effect, so that the obtained concrete has extremely high chloride ion penetration resistance and durability, and is particularly suitable for support and protection engineering in chlorine salt environments such as temporary expressways and the like.

The invention provides a bio-based composite environment-friendly snow melting agent. The bio-based composite environment-friendly snow melting agent comprises the following components in parts by weight: 20-50 parts of a bio-based component, 15-30 parts of a chlorine salt component, 5-10 parts of calcium oxide, 10-20 parts of urea, 20-40 parts of potassium acetate, 2-8 parts of a composite corrosion inhibitor and 2-8 parts of an anti-skid adsorption component. According to the bio-based composite environment-friendly snow-melting agent disclosed by the invention, a renewable bio-based material is used for partially replacing a traditional snow-melting component and is compounded with conventional chlorine salt and non-chlorine salt snow-melting components, and a composite corrosion inhibitor and an anti-skid adsorption component are added, so that the aims of efficiently melting snow, being low in corrosivity and being harmless to the environment can be fulfilled.

The invention provides a Fe-Co-Ni series nano-alloy and a preparation method and application thereof, and belongs to the technical field of functional materials. The alloy is prepared by the following steps of: weighing and proportioning 0.5 mmol of each element by taking chlorate or acetylacetonate or acetate of iron, cobalt, nickel, manganese, copper, zinc and the like with the purity of more than 99.5% and other metal chlorides which are rich in earth surface and economical and practical as precursors, putting the precursors into a pressure-resistant bottle, taking n-trioctylphosphine oxide (TOPO) as a ligand, taking ethanol and 1-octadecene (ODE) as a mixed solvent, and uniformly stirring to prepare the alloy. And synthesizing the hexagonal nano-alloy at low temperature by using a wet chemical method. The method can be used for synthesizing 3-10-element medium-entropy and high-entropy alloy, and has a wide application prospect. The synthesis is a precise process which is guided by an organic ligand, is coordinated by multiple metals and is subjected to nucleation-self-assembly-anisotropic growth.

A method of recycling a waste catalyst coated membrane material comprising an ionomer membrane, a catalyst comprising iridium and a catalyst comprising at least one of platinum, palladium and / or ruthe

The invention belongs to the technical field of photocatalytic application, and particularly relates to a photocatalytic leaching method for precious metal in a brine phase of chlorate. The method comprises the following steps: mixing the waste rich in noble metal, a solution containing chlorate and a photocatalyst, carrying out photocatalytic leaching reaction on the obtained mixed slurry under an illumination condition, and carrying out solid-liquid separation to obtain a leaching solution containing noble metal. The chlorate solution is used as a solution environment, a photocatalytic leaching method is used, precious metal is oxidized to generate a precious metal chlorine complex, the precious metal chlorine complex is dissolved in water, and finally the purpose that the precious metal is leached into a solution from a solid is achieved. The method has the characteristics of low reaction cost, low reaction energy consumption and high leaching rate.

A method of treating a subterranean formation by contacting the formation with the following (a) ammonium bicarbonate; (b) an oxidizing agent selected from a perchlorate or a nitrite or combinations thereof; and (c) an acid (AA).

The present invention relates to systems and methods for catalytic removal of oxidized contaminants (for example, nitrite, chromate, chlorate, trichloroethene, CFC-11, 4-nonylphenol, RDX, and perfluorooctanoate) from water and wastewater. In some aspects, the catalytic method of removing oxidized contaminants comprises using precious metal nanoparticles as catalysts to reduce the oxidized contaminants.

The application discloses activated carbon for reducing content of chlorate in water and a preparation method thereof, and belongs to the technical field of wastewater treatment. The application sequentially constructs a chlorinated glycidyl trimethyl ammonium cation layer for electrostatic adsorption of chlorate and a nano zero-valent iron functional layer for chemical reduction of the chlorate on the coconut shell activated carbon through bridging action and chemical grafting of polydopamine, forms a unique 'adsorption-degradation' integrated structure, greatly improves the treatment efficiency, ensures stability of functional components through chemical bonding, avoids secondary pollution, and has remarkable social, economic and environmental benefits.

A system, comprising: a chlorine source in form of an electrolysis unit to generate an insitu generated active chlorine; wherein a concentration of perchlorate is not more than half of a concentration of chlorate; and pH of a fluid containing in-situ generated active chlorine is more than 7.4; a buffer tank to store a concentrate of in-situ generated active chlorine as a free available chlorine (FAC); a fluid distribution system to supply FAC in form of an in-use fluid to the cabinet; wherein the system is configured to clean and disinfect an article with the fluid while complying with national and international standards for food safety, operator's safety and regulatory requirements regarding the use of biocides.

Aerobic microbial processes comprise culturing microbes comprising a (per)chlorate respiration pathway in a bioreactor in a bioprocess employing microbial respiration of chloroxyanions as a source of oxygen for the bioprocess, in the absence of external addition of molecular oxygen.

The invention discloses a multistage oxidation treatment method of petroleum refining waste lye, and belongs to the technical field of hazardous waste treatment.The multistage oxidation treatment method comprises the steps that 1, ZnSx at-Fe3O4 / MIL-100 (Fe) and a chlorate-containing oxidizing agent solution are added into the waste lye, a reaction is conducted for 4-6 hours under the micro-negative pressure condition, and most of foul smell is eliminated; (2) adding hydrogen peroxide into the mixed solution treated in the step (1), and reacting at room temperature for 2.5-3.5 hours to completely deodorize; adjusting the pH (Potential of Hydrogen) to 8.0 to 9.0; (3) carrying out solid-liquid separation on the mixed solution treated in the step (2), recycling filter residues, and carrying out next-step reaction on filtrate; 4) adjusting the pH value of the filtrate treated in the step 3) to 2.8-3.3 by using dilute sulphuric acid, and adding ferrous sulfate / hydrogen peroxide into the filtrate for deep treatment; adjusting the pH (Potential of Hydrogen) to 8.0 to 9.0; and (5) carrying out solid-liquid separation on the mixed solution treated in the step (4), and recycling the filtrate after evaporative desalination and biochemical treatment.

The utility model discloses a reactor of chlorine dioxide generator relates to chlorine dioxide preparation technical field, including multistage reaction unit of intercommunication, and the liquid communication pipe and the gas communication pipe are communicated between adjacent reaction unit, and the first stage reaction unit is connected with the feed dynamic mixer, and the last stage reaction unit is connected with the disinfectant outlet pipe and the disinfectant gas outlet pipe. The reactor can realize gas, liquid branch circuit operation in use, make the chlorine dioxide in the reaction liquid in time from the reaction liquid to the gas phase space of reactor, then from disinfectant gas outlet pipe, prevent the chlorine dioxide from the disproportionation reaction and generate chlorate in liquid phase, to improve its reaction effect, raw material conversion rate, chlorine dioxide purity improves obviously, prevented the occurrence of disproportionation reaction.

The present disclosure relates to a process for the production of alkali metal chlorate in a single compartment electrolytic cell, which avoids the need for addition of sodium dichromate to the process, in which unwanted side-reactions are reduced by using a cathode having an electrocatalytic top layer on a substrate that optionally also has one or more intermediate layers. The top electrocatalytic layer comprises an oxide of manganese and / or cerium.

The invention discloses a formation fluid interpretation method, device and equipment based on core chlorine salt content and a storage medium, and relates to the technical field of geological evaluation while drilling, and the method comprises the following steps: collecting well logging and logging data and oil testing data of a tested oil well in a research area, and screening out water analysis data corresponding to gas testing display in a test section; further screening out chloride ion test well section data from the re-screened test section, and dividing the test section into a water layer and a gas layer according to an oil test result; obtaining the relationship between the content of chlorate in the core test and the salt concentration of the stratum matrix and the salt concentration of the stratum water through the reservoir rock model; fitting the research area to obtain the salt concentration of the stratum matrix and the salt concentration of the stratum water; and a water and gas reservoir discrimination function is established for judging the properties of other reservoirs in the research area, so that the problems of difficulty in fluid evaluation of the reservoir while drilling and low evaluation accuracy in the prior art are solved.

The invention discloses a detection kit and a detection method for chlorate in dairy products and water, chlorate is converted into 2, 4-dichloroaniline, the chlorate detection kit is prepared by constructing a 2, 4-dichloroaniline antigen-antibody expression system and utilizing an immunodetection technology, and further, colloidal gold test paper is prepared. The detection time of the kit is only 5-10 minutes, the sensitivity can reach 50-100 mu g / kg (0.05-0.1 ppm), on this basis, a method for detecting chlorate in dairy products and water is further provided, the method is simple in operation step, high in detection speed, high in sensitivity and small in relative error, and compared with the national standard, the method has the advantages that a detection instrument is simple and easy to operate, the detection cost is low, and the like. The method is suitable for rapid detection of large-batch samples.

Gas generating and releasing devices, which produce and release chlorine dioxide gas without detectable amounts of any toxic by-products such as chlorine gas, chlorites, or chlorates are provided herein. Such devices are useful for disinfection, sanitation, sterilization, and control of biological or pathogenic contamination.

A method for testing the content of perchlorate comprises the following steps: adding a separating agent and an organic extractant I into a sample for extraction I, adding a fluorescent complexing agent solution into the obtained water phase, mixing, standing for more than 2 minutes, adding an organic extractant II for extraction II, and calculating the content of perchlorate in the sample according to the fluorescence characteristics of the obtained organic phase, the separating agent is prepared from crystals A, potassium chloride and water according to the mass ratio of (0.01-0.03): 1: (40-100); the main component of the crystal A is methylene blue; the fluorescent complexing agent is a phthalic acid bisamide derivative. The method is high in sensitivity and accurate in quantification; the capacity of resisting interference of inorganic anions is achieved, the sample pretreatment requirement is reduced, and the good detection effect on multiple kinds of liquid is achieved; the instrument hardware requirement is low, and the detection cost is low.

The invention provides a method for removing perchlorate from an aqueous solution with a catalyst that comprises ruthenium in the presence of a nitrogen source or that comprises ruthenium on a nitrogen-functionalized support material. The invention also provides solutions and reactors that are useful for removing perchlorate from an aqueous solution.

To provide a method for producing a chlorous acid aqueous solution using a product obtained by electrolyzing a salt as a raw material.SOLUTION: The present invention provides a method for producing a chlorous acid aqueous solution using a salt as a raw material. The present invention provides a method for producing a chlorous acid aqueous solution, comprising the steps of: 1) electrolyzing a salt to obtain a chlorate or an aqueous solution thereof; and 2) reducing the chlorate or the aqueous solution thereof to produce an aqueous solution containing chlorous acid. The method for producing the chlorous acid aqueous solution includes a step of mixing any single substance or two or more single substances of an inorganic acid or an inorganic acid salt, and then mixing any single substance or two or more single substances of an inorganic acid, an inorganic acid salt, an organic acid, or an organic acid salt.SELECTED DRAWING: None

The invention relates to a method (70) for cleaning an aqueous composition, referred to as the conveying composition (61), for conveying floating objects belonging to the group of fruits and vegetables, in a hydraulic conveyor of such floating objects, the hydraulic conveyor being of a type; —with the recirculation of the conveying composition (61), and; —with treatment of the conveying composition (61) by addition of chlorine dioxide (65) kept in the conveying composition (61) during the conveying of such floating objects for the purposes of controlling the microbiological flora growing in the conveying composition (61), whereby a conveying composition, referred to as a chlorate-rich composition (66), comprising the chlorate anion of general formula (CO3) in a hydrated form in the chlorate-rich composition (66), is formed due to this treatment; method in which, the hydraulic conveyor being devoid of floating objects and the addition of chlorine dioxide (65) in the chlorate-rich composition (66) being suspended; a flow rate of a composition, referred to as the composition (42) to be cleaned, formed by mixing a flow of the chlorite-rich composition (66) and at least one flow of a composition, referred to as the photoreactive composition (40), comprising at least one photo-sensitive compound chosen from the group formed of sulfite anion salts, bisulfite anion salts, disulfite anion salts and salts of a hydrosulfite anion is irradiated (75) by an electromagnetic radiation comprising at least one electromagnetic wave in the UV-C range, so as to form, in this composition (42) to be cleaned, at least one compound, referred to as the active compound (77), capable of reacting chemically with chlorate anion F and forming a conveying composition, referred to as the cleaned composition (67), with a concentration of chlorate anion less than the concentration of chlorate anion in the chlorate-rich composition (66). The invention also relates to a hydraulic conveyor equipped with a cleaning device for implementing such a method.

The invention belongs to the technical field of metal smelting, and relates to a method for synergistically enriching platinum and palladium from a silver anode mud nitric acid leaching solution and preparing sponge palladium in a green short process, which comprises the following steps: adding a diacetyldioxime-thiourea alkaline solution into the silver anode mud nitric acid leaching solution to carry out platinum and palladium co-precipitation to obtain a co-precipitate; after slurrying, adjusting the pH value to 9.0-10.0, and carrying out primary alkaline conversion; then hydrochloric acid is added for secondary conversion, and a chlorate saturated solution is added for a reaction after secondary conversion is finished, so that platinum-palladium-containing filtrate is obtained; then adding an oxidizing agent and ammonium chloride, and reacting to obtain a platinum-palladium co-precipitate; after slurrying, adding a reducing agent for reaction to obtain a palladium-containing solution; then adding an oxidizing agent and ammonium chloride, and reacting to obtain high-purity palladium-containing slag; mixing with ammonia water for complexing, adding hydrazine hydrate after reaction, and reducing to obtain sponge palladium. According to the method, reaction conditions are mild, multi-component recovery of platinum, palladium and silver in the silver anode slime is achieved, and the resource utilization rate is high.

The application discloses a preparation method and application of canthaxanthin, and comprises the following steps: in the presence of beta-carotene, a catalyst, an additive and a solvent, the canthaxanthin is prepared by reaction at a temperature of-20 DEG C to 20 DEG C for 5-24 hours; the catalyst comprises a mixture of chlorate, metal iodide and inorganic acid; the additive comprises a mixture of raw materials represented by formula I, formula II and formula III, wherein the mass ratio of the raw materials represented by formula I, formula II and formula III is 1:(1.0-5.0):(1.0-5.0); and the total additive amount of the additive is 0.01-1 times the mass of the beta-carotene. The preparation method of the canthaxanthin has the characteristics of fast reaction speed, high product yield, less generation of three wastes, strong coloring capacity of the product and excellent thermal stability, and has great competitive advantage in the field of food and drug additives.

The invention discloses a constant temperature drying oven for determining chlorate content and a determination method using the drying oven, and relates to the technical field of constant temperature drying ovens. The invention comprises a placing plate and a partition plate of a main body of the constant temperature drying oven, wherein a placing plate is movably installed inside the main body of the constant temperature drying oven, and a plurality of groups of partition plates are installed on the upper end of the placing plate, and mounting columns are movably installed inside the main body of the constant temperature drying oven, and the placing plate and the plurality of groups of partition plates are fixedly connected to the mounting columns, and a heating module is installed inside the plurality of groups of partition plates, and a plurality of groups of reserved holes are provided on the upper end of the placing plate. The invention provides a placing plate and a partition plate, and the plurality of groups of partition plates divide the upper end of the placing plate into a plurality of placing spaces, and the heating modules inside the partition plates heat the placing spaces respectively, so that when taking a group of experimental reagents, the other plurality of groups of experimental reagents maintain a dry constant temperature effect, thereby improving the accuracy of experimental data and the experimental effect.

Provided is a nickel recovery method for efficiently recovering nickel from a nickel solution containing 2,2'- bipyridine and a nickel compound generated in an organic chemical reaction process.　The nickel recovery method according to the present invention comprises: (a) a step for preparing a nickel solution containing 2,2'- bipyridine and a nickel compound generated in an organic chemical reaction process; (b) a step for adding an alkali metal perchlorate to the nickel solution to form a tris (2,2'- bipyridine) perchlorate nickel salt serving as an ion pair; and (c) a step for recovering the tris (2,2'- bipyridine) perchlorate nickel salt.

To provide an agent that imparts immediate and sustained disinfecting effects to epidemic prevention slaked lime used in "anticipatory disinfection," and a new epidemic prevention disinfectant that uses the agent in combination with epidemic prevention slaked lime. [Solution] An antibacterial and antiviral agent containing a chlorite-supported inorganic porous material (A) in which chlorite is supported on an inorganic porous material, and lauryl sulfate (B).

The invention relates to a fuel-free low-temperature oxygen candle oxygen-producing flux core which is prepared by uniformly dry-mixing 96-98 wt% of a chlorate oxygen-producing source, 1-2.5 wt% of a catalyst, 0.1-1 wt% of a chlorine inhibitor and 0.1-0.5 wt% of a high-thermal-conductivity carbon-based nano material as raw materials and pressing the raw materials, and the density of the oxygen-producing flux core is 1.9-2.5 g / cm < 3 >. The oxygen-producing flux core adopts a fuel-free formula, can realize continuous and stable combustion in a low-temperature environment of-50 DEG C until oxygen release is finished, and is high in safety, high in reliability, low in heat production, stable in oxygen release and free of chlorine in released gas.

The preparation method comprises the following steps: dissolving a certain amount of noble metal palladium chlorate or silver nitrate in a certain amount of absolute methanol to obtain a solution A; adding a certain amount of alumina powder into a certain amount of absolute methanol to obtain a solution B; adding the solution A into the solution B, and adding a certain amount of methanol solution of 1M sodium hydroxide; and centrifugally washing the obtained precipitate with absolute ethyl alcohol for 3-5 times, drying at 60-80 DEG C for 12-15 hours, and calcining in a tubular furnace at 400-500 DEG C in a hydrogen atmosphere to obtain the noble metal loaded aluminum oxide catalyst. The preparation process is simple and practical, the particle size of the noble metal Pt or Ag is reduced to dispersed single atoms, the dispersity is improved, the noble metal loading amount required by catalysis is reduced, the cost is reduced, and the prepared catalyst is stable in catalytic performance, good in activity and high in catalytic efficiency and can be commercially used.

The application provides a kind of detecting perchlorate ratio type probe and its preparation method and application, it is related to analytical detection technical field, the ratio type probe includes poly (3- ((4-methyl thiophene-3-oxyl) propyl) pyridine), preparation method includes: 3- (3-bromopropoxy) -4-methyl thiophene and pyridine are mixed and reacted, 3- ((4-methyl thiophene-3-oxyl) propyl) pyridine is synthesized, it is reacted with anhydrous chloroform, anhydrous ferric chloride and obtained intermediate product;Intermediate product is transferred and filtered, and solid precipitate is obtained, methanol is added, and hydrazine hydrate is added dropwise to reduce, then filter, the methanol of filtrate is removed by evaporation, and the crude product is obtained;The crude product is dialyzed and purified, and poly (3- ((4-methyl thiophene-3-oxyl) propyl) pyridine) is obtained.The ratio type probe provided by the application shows chromatic aberration response and high detection sensitivity. ‑ ​

Provided herein is an indicator system comprising permanganate, an organic reducing agent, an acid, and an inorganic perchlorate. Methods of using the indicator system to monitor the integrity of a biological sample are also provided. The systems and methods described herein can provide an individual aliquot level thaw status indicator that is easy to use for indicating time-temperature exposure of a biological sample.